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What Are Heterozygosity and Homozygosity?

Choose the co...

Question

Choose the correct answer from the alternatives given.
The allele for pea comb (P) in chickens is completely dominant to the allele for single comb (p). The alleles for black feather colour (B), and white feather colour (B) show codominance, so that BB individuals possess blue feathers. If chickens heterozygous for both pairs of genes are mated, what proportion of offspring are expected to be pea combed and white feathered?

A

9 / 16

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B

3 / 16

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C

1 / 16

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D

2 / 16

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Solution

The correct option is A 3 / 16
In a cross of PpBb and PpBb,
The individuals with Pea-comb and white feathers include PPbb, Ppbb and Ppbb.
So, the correct option is '3/16'.

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